Multiferroic and magnetoelectric nature of GaFeO _3, AlFeO _3 and related oxides

Saha R.; Shireen A.; Shirodkar S.N.Waghmare U.V.Sundaresan A.Rao C.N.R

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Multiferroic and magnetoelectric nature of GaFeO _3, AlFeO _3 and related oxides

机译：Multiferroic and magnetoelectric nature of GaFeO _3, AlFeO _3 and related oxides

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GaFeO _3, AlFeO _3 and related oxides are ferrimagnetic exhibiting magnetodielectric effect. There has been no evidence to date for ferroelectricity and hence multiferroicity in these oxides. We have investigated these oxides as well as oxides of the composition Al _(1-x-y)Ga xFe _(1y)O _3 (x=0.2, y=0.2) for possible ferroelectricity by carrying out pyroelectric measurements. These measurements establish the occurrence of ferroelectricity at low temperatures below the Nèel temperature in these oxides. They also exhibit significant magnetoelectric effect. We have tried to understand the origin of ferroelectricity based on non-centrosymmetric magnetic ordering and disorder by carrying out first-principles calculations.

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来源
《Solid State Communications》 |2012年第21期|1964-1968|共5页
作者
Saha R.; Shireen A.; Shirodkar S.N.Waghmare U.V.Sundaresan A.Rao C.N.R;
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作者单位

Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India;

New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India;

Theoretical Science Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India;

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正文语种英语
中图分类固体物理学;
关键词
D. Ferroelectricity; D. Magnetoelectric; D. Multiferroic; D. Pyroelectric;

Multiferroic and magnetoelectric nature of GaFeO _3, AlFeO _3 and related oxides

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